 
   These handlers take two arguments;  `coeffects` and `event`, and they return `effects`.
 
-  (fn [coeffects event]
-     {:db ...
-      :dispatch ...})
+      (fn [coeffects event]
+         {:db ...
+          :dispatch ...})
 
    Wrap handler in an interceptor so it can be added to (the RHS) of a chain:
      1. extracts `:coeffects`


  These handlers take two arguments;  `db` and `event`, and they return `db`.

  (fn [db event]
     ....)

  So, the interceptor wraps the given handler:
     1. extracts two `:coeffects` keys: db and event

  "Returns an interceptor which wraps the kind of event handler given to `reg-event-ctx`.
  These advanced handlers take one argument: `context` and they return a modified `context`.
  Example:

      (fn [context]
         (enqueue context [more interceptors]))"
  [handler-fn]
  (->interceptor
    :id     :ctx-handler
